Search Results for: spindle-cell hemangioma

Confusion—specimen mix-up in dermatopathology and measures to prevent and detect it

Confusion—specimen mix-up in dermatopathology and measures to prevent and detect it

…CrossRef 13. Swetter SM, Boldrick JC, Pierre P, Wong P, Egbert BM. Effects of biopsy-induced wound healing on residual basal cell and squamous cell carcinomas: rate of tumor regression in excisional specimens. J Cutan Pathol. 2003;30(2):139-46. 14….

Differential Diagnosis in Dermatopathology

Morphea, late stage vs. Collagenous nevus

A systemic disease, which manifests itself in the skin first as violaceous macules and patches that tend to progress to papules and plaques, and sometimes to nodules and tumors, all of which represent hyperplasia of endothelial cells.

Differential Diagnosis in Dermatopathology

Papular mucinosis vs Interstitial granuloma annulare

A systemic disease, which manifests itself in the skin first as violaceous macules and patches that tend to progress to papules and plaques, and sometimes to nodules and tumors, all of which represent hyperplasia of endothelial cells.

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…stellate 8. No apparent increase in amount of collagen 8. Increase an amount of basophilic-staining collagen 9. Hair follicles spared by the process 9. Hair follicles destroyed by the process 10. No perivascular infiltrate of inflammatory cells 10….

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…scarring processes, e.g., dermatofibroma. 10.70.2A: Panniculitis, lobular + 10.70.2B: Interwoven fascicles of plump oval and spindle-shaped fibrocytes in conjunction with fibrillary bundles of collagen, abundant mucin, scattered lymphocytes, and…

Histologic Diagnosis of Inflammatory Skin Diseases

Nodular fasciitis

…fibroplasia occurs late and accounts for the firmness. Differential diagnosis histopathologic Fibrosarcoma exhibits abnormal spindle cells arranged in fascicles that tend to assume a herringbone pattern and does not display either abundant mucin or,…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…not qualify as an inflammatory disease because of the absence of inflammatory cells. 11.18.2A: No infiltrate of inflammatory cells + 11.18.2B: Fibrocytes and mast cells amidst mucin in the upper part of the dermis = Scleromyxedema At scanning…

Histologic Diagnosis of Inflammatory Skin Diseases

Scar

…ose cells bring forth the entire infundibulo-apocrine-sebaceous-follicular unit. Low-grade fibrosarcoma consists of abnormal spindle cells arranged in fascicles that often interweave in a herringbone pattern. Laboratory confirmation None exists….

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Fibromatoses?

…gray area between reactive proliferations and neoplasms and range from those composed largely of dense collagen with sparse spindle cells to densely cellular tumor-appearing masses. Classification: Palmar, plantar and penile fibromatosis Desmoid…